Poly (p < /em>-bromophenyl acrylamide) (PBPA) homopolymer was prepared and characterized. Thermal degradation products of the polymer were identified by GC-MS technique. It seems that the mechanism of degradation of PBPA homopolymer is characterized by free radical formation followed by recombination along the backbone chain. The activation energy of thermal degradation of the homopolymer was calculated using Arrhenius equation.